NJ7P SQL Tube Database Query

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A horizontal ribbon.

6FJ7
Medium-Mu Twin Triode

EIA Base & Outline

EIA Base: 12BMEIA Bulb: 9-58
Source ........................................ GE - 1973

Application

Source ........................................ GE - 1973
Duodecar type used as combined vertical-deflection oscillator and vertical-deflection amplifier in color and black-and-white television receivers.

Source ........................................ GE - 1973
Triode unit 1 is used as an oscillator, and triode unit 2 is used as an amplifier. Requires duodecar 12-contact socket.

Mechanical Data

Source ........................................ GE - 1973
Bulb .......................................... T-9
EIA Outline ................................... 9-58
EIA Base ...................................... 12BM

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.9 A

Direct Interelectrode Capacitances (approx)

Triode 1
Source ........................................ GE - 1973
Input ......................................... 2.2 pf
Output ........................................ 0.48 pf
Grid to Plate ................................. 3.8 pf

Triode 2
Source ........................................ GE - 1973
Input ......................................... 4 pf
Output ........................................ 0.54 pf
Grid to Plate ................................. 5 pf

Maximum Ratings (Design Center Values)

Triode 1
Source ........................................ GE - 1973
Plate Voltage ................................. 350 V
Plate Dissipation ............................. 1.0 W

Triode 2
Source ........................................ GE - 1973
Plate Voltage ................................. 550 V
Plate Dissipation ............................. 10 W

Characteristics and Typical Operation

Triode 1 Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -3 V
Amplification Factor .......................... 66
Plate Resistance (approx) ..................... 30K Ω
Transconductance .............................. 2200 µMho
Plate Current ................................. 2 mA

Triode 2 Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -25 V
Amplification Factor .......................... 5.5
Plate Resistance (approx) ..................... 920 Ω
Transconductance .............................. 6000 µMho
Plate Current ................................. 40 mA

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Sat, 25 Jun 2022 16:54:52 -0700